Composite body, its use and a process for its production
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United States of America Patent
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May 14, 1996
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N/A
app pub date -
Sep 24, 1993
filing date -
Mar 27, 1991
priority date (Note) -
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Abstract
A composite body, especially for use as a cutting tool, for the lining of combustion chambers or for movable parts intended to have low wear which has a substrate of hard metal, steel, cermet or nickel or cobalt alloy. The substrate is provided with at least one fine-crystalline alpha-Al.sub.2 O.sub.3 layer deposited by plasma activated CVD at 400.degree. to 750.degree. C. With plasma activation by pulsed direct voltage with the substrate connected as the cathode.
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